4. Technical Reports
4.1 Key Stone Project
Correlation Processing Control Software (Tetsuro Kondo)
We named correlation processing control software "KATS"
(KAnameishi (= keystone) data processing Togo (= unified) Software).
KATS unifies the steps from correlation processing to just before the creation
of database. It aims at realizing an easy operator interface.
The function of KATS is summarized as follows:
(1) Set up of parameters passed to correlator
(2) Automatic clock search
(3) Dynamic clock offset correction
(4) Operatorless operation except for initial tape setting
(5) Automatic execution of band-width synsthesizing software
(6) Execution of database creation software
(7) Archive correlation data
Presently debugging of the whole correlation system is being carried out.
![](kondofig1.gif)
Figure 3. KSP correlation system
![](corfig_1st.gif)
Figure 4. Coarse search function using KSP correlator out
Q&A
Q: When the sampling frequency is 8 MHz, a 32 bit-lag window merely covers
a range of 4 micro seconds. Is dynamic clock offset correction working
well for such a narrow window?
A: At first, clock search is carried out on extended lag windows
by connecting 16 unit correlators serially. Once fringes are detected,
we think that change of clock offset is much less than 4 micro
seconds for time interval between scans (= about several minitutes).
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